Mg2 gradients as a signature of brightest cluster galaxy evolution

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dc.contributor.author Loubser, Susan Ilani
dc.contributor.author Sánchez-Blázquez, P.
dc.date.accessioned 2012-11-12T09:27:58Z
dc.date.available 2012-11-12T09:27:58Z
dc.date.issued 2011
dc.identifier.citation Loubser, S.I. & Sánchez-Blázquez, P. 2011. Mg2 gradients as a signature of brightest cluster galaxy evolution. Monthly notices of the Royal Astronomical Society, 415(4):3013-3020. [http://onlinelibrary.wiley.com/journal/10.1111/%28ISSN%291365-2966/] en_US
dc.identifier.issn 0035-8711
dc.identifier.issn 1365-2966 (Online)
dc.identifier.uri http://hdl.handle.net/10394/7747
dc.description.abstract We have fitted the Mg2 absorption index gradients for 21 brightest cluster galaxies (BCGs), in the nearby Universe, for which we have obtained high signal-to-noise ratio, long-slit spectra on the Gemini telescopes. This is a subsample of a large optical, spatially resolved, spectroscopic sample of BCGs which allows possible connections between the kinematical, dynamical and stellar population properties to be studied. We find a weak correlation between the Mg2 gradients and central velocity dispersion, with gradients becoming steeper with increasing mass. An equivalent correlation for normal ellipticals in the same mass range is not found, suggesting that the BCG stellar population profiles are shaped by mechanisms related to the potential well of the cluster where they live. This suggestion is reinforced by the existence of a correlation between the Mg2 gradients and the BCG distance to the X-ray peak luminosity of the cluster. en_US
dc.description.uri http://dx.doi.org/10.1111/j.1365-2966.2011.18909.x
dc.description.uri http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2966.2011.18909.x/pdf
dc.language.iso en en_US
dc.publisher Wiley en_US
dc.subject Galaxies: elliptical and lenticulE, cD en_US
dc.subject galaxies: evolution en_US
dc.subject galaxies: stellar content en_US
dc.title Mg2 gradients as a signature of brightest cluster galaxy evolution en_US
dc.type Article en_US

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